Fellwing (c) 2026 CyberMax. All rights reserved.
Game code, flight model, terrain renderer, aircraft models, instruments and sound: CyberMax (everything is generated in code).
The Kestrel T-3, Rook 9 STOL, Strix A2 and Vesper SJ are fictional aircraft.

Data (all free for commercial use with attribution; loaded or packed as noted):
- Elevation: AWS Terrain Tiles (Mapzen / Tilezen "terrarium"), Registry of Open Data on AWS, https://registry.opendata.aws/terrain-tiles/
  loaded straight from the public bucket while you fly. Sources and required notices:
  * SRTM, 3DEP (formerly NED) and GMTED2010 data courtesy of the U.S. Geological Survey
  * ETOPO1: U.S. National Oceanic and Atmospheric Administration (DOC/NOAA/NESDIS/NCEI). Not for navigation.
  * Europe terrain data produced using Copernicus data and information funded by the European Union - EU-DEM layers
  * Canada terrain data contains information licensed under the Open Government Licence - Canada
  * United Kingdom terrain data (c) Environment Agency copyright and/or database right 2015. All rights reserved (Open Government Licence v3)
  * Norway terrain data (c) Kartverket (CC BY 4.0)
  * Australia terrain data (c) Commonwealth of Australia (Geoscience Australia) 2017 (CC BY 4.0)
  * New Zealand terrain data Copyright 2011 Crown copyright (c) Land Information New Zealand and the New Zealand Government (CC BY 3.0 NZ)
  * Austria terrain data (c) offene Daten Oesterreichs - Digitales Gelaendemodell (DGM) Oesterreich (CC BY 3.0 AT)
  * Mexico terrain data source: INEGI, Continental relief, 2016
  * ArcticDEM terrain data DEM(s) were created from DigitalGlobe, Inc., imagery and funded under National Science Foundation awards 1043681, 1559691, and 1542736
  * Terrain Tiles: Mapzen
- Earth colours (earth.webp, a 4096x2048 copy): NASA Earth Observatory, Blue Marble: Next Generation (Reto Stoeckli), July 2004
- Runway ends and elevations (19 runways, packed in places.js): OurAirports, https://ourairports.com/data/ (public domain)
Ground colours, rock, snow, water and clouds are drawn by the game from the elevation; no satellite or aerial photos are used.
Fellwing is a game, not a navigation or training device.

Third-party software and fonts:
- three.js r170 (MIT License, Copyright 2010-2024 three.js authors), vendor/three.module.min.js
- Barlow Condensed by Jeremy Tribby (SIL Open Font License 1.1), fonts/barlow-condensed-800.woff2, https://openfontlicense.org

three.js licence (MIT): Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy,
modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished
to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or
substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT
OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.